三氟甲磺酸催化萘烷基化研究

摘要

Using trifluoromethanesulfonic acid as catalyst for naphthalene alkylation was stud-ied. The effects of catalyst dosage,temperature,the ratio of naphthalene and α-olefin,dropping time on the alkylation of naphthalene and the oxidation stability of alkylated naphthalene were investigated. The results showed that under the reaction conditions of a naphthalene/1-dodecene mole ratio of 1:3,a reac-tion temperature of 80 ℃,a dropping time of 3 h and a reaction time of 1 h,the kinematic viscosity of the alkylate is 16. 35 mm2/s at(100 ℃),the conversion reachs 96%. At the same time the bromine index is 168 mgBr2/(100 g),no need to further hydrorefining process. The high pressure differential scanning cal-orimetry(PDSC)experiments showed that the antioxidant stability of PAOs increases with the addition of certain amount of alkylated naphthalene.%使用三氟甲磺酸作催化剂对萘烷基化反应进行研究,考察了催化剂用量、反应温度、萘烯比、滴加时间等条件对萘烷基化反应的影响,同时对烷基萘产品的抗氧化安定性进行研究.结果表明,在萘烯摩尔比为1:3、反应温度为80 ℃、滴加时间为3 h、反应时间为1 h、催化剂用量为0. 8%的条件下,烷基萘产品的运动黏度(100 ℃)为16. 35 mm2/s,烷基化反应转化率为96%,产品溴指数为168 mgBr2/(100 g),并不需要进一步加氢精制工序.高压差示扫描量热法实验结果表明,在聚α-烯烃中加入一定比例烷基萘产品有助于提高其抗氧化安定性.